Combined heater and muffler



Dec. 29 1925- 1,567,792

G. H. EARLE COMBINED HEATER AND MUFFLER Filed Feb. l, 1921 Patented' Dec. 29, 1925.

1,567,792 PATENT OFFICE.

GEORGE i1.' EARLE, on VALPARAISO, INDIANA. y

COMBINED HEATER .AND MUFFLER.

Application filed February To" iviom it concer/.5 Be it known vthatI, GEORGE H. EAnLn, a

citizenof the United States, residing at Valparaismgin the county of Porter and State of Indiana,.have invented certain new andy useful Improvements -in Combined Heaters and Muliiers, of which the following is a specification. t

My -invention.. relates to a combined heaterand inuiilerand it consists more cs-V pecially ofthe features hereinafter pointed out in the annexed claims.

`The purpose ofmy invention is to provide a unitary device which utilizes the maximum radiation from`V an. automobile muffler to warm a cold stream of air from within the car and again returnthe same in a heated state ;v 'that provides means to control the `volume of heatedair; that employs the exhaust gases at their highest temperatures to serve as a heating agent; that thereafter gradually reduces the press'ure'of such gases Ato effectively inutile the same and accomplish this withouty filling the passageways with deposited carbon; and that in addition secures these results ina simple and economical manner without complex and intricate mechanism.

l With these and othei'fie 'in view I illus-V trate in the accompanyin -drawing such instances of adaptationthatjwill disclose .the broad underlying features ofv my invention, without limiting myself to the specific details of construction shown thereon and described herein.x

Fig. 1 is a side elevation of a complete device, in position.

Fig. 2 is an end elevation of Fig. 1, partly in section.

Fig. 3 isa side elevation of Fig. 2, in section, showing parts broken away.

Fig. 4 isa pers ective view of the external casing parta y broken away to show the interiorstructura Fig. 5 is'a erspective view of one of the louvres, detaciied from the rest of the associated structure.

In carrying out the various features of my invention, I may use the details shown or' any equivalents thereof as may be found desirable. The present exempliiication comprises a heater that surrounds a specially constructed mutlier land which delivers the f1. having an inlet'2 to .receive the exhaust 1, 1921. Serial No. 441,704.

gases of the engine (notshown) and an outlet 3. These are formed in-head's 4 that abut the outer casing 7 and the tie rods 12 hold these parts assembled. lVithi'n the outer tube or casing 7 an intermediate tube 6 is placed and inside of this an inner tube -5 is secured. Between tubes and 7 an outer passage 9 is formed and between tubes and 6 an intermcdiatepassage 10 is also formed. Openings 11-lead from the latter passage to the interior of tube These passages encircle the tubes, and at the inlet end they are 4all closed by the conical yde- Hector 8, except the outer passage.

In this .ginvention the hottest gases are first delivered to thel outer passage 9. so that the full 'benefit of their heat is secured for the heaterwhich surrounds the major portion of the muiiiers length. By reason of this envelopment of the mulder the gases within it` are not cooled too quickly thus avoiding the accumulation of carbon. In

muiflers of the ordinary type the hottest gases are irst led intoan inner tube to prevent their too sudden cooling, for the same reasons mentioned above.

Withmy improvement I gain this advantage by securing a complete cooperation between the heater and the muiiier, making the muliier dependent on the heater and the heater on the muliler, by reason of my first leading the hottest gases near vthe warm air passages of the heater.

The heater easing may be made in any de sired relation with respect to the way its sides and ends are secured to each other,

lwhether made of separate pieces or otherwise. It has ends 13 in which openings 14 are formed to receive the muiiier 1. The sides 16 are curved approximately as shown. Theydo not extend the full depth of the ends 13, but terminate "in an inwardly projecting flange 17 and the ends 13 depend below this point at 15.

' The upper edges 18 -of the sides are straight to enter an opening made in the floor 20 of the car; also to coact with the floor grating .21. The ends 13 are also provided with holes 19 to receive pins 22 of the louvres or damper ends 27 on which the latter are pivoted for movement in opening or closing the air passages of the heater.

The louvres are clearly shown in Fig. 5. They are made in right and left pairs, that shown being the left hand one. The sides 23 are curved so as to be approximately coneentriewith the muiller l when in an open' position. 'The extreme bottom -is formed as an apron 26 from which a narroiv curved portion extends upward to the edge of a lengthwise slot 24 that is madel about the full `length of the inside of the heater.

At vthe upper edge 28 the louvre is made straight from its junction with the side 23 upward. The Aportions 28, 23, 25 and 26 have in 'ardly projecting flanges 27 in Which holcsv29 are formed. These holes register with holes .19 ofthe outer casing.l Pins 22 are placed in them, on which the louvres are pii'oted; the flanges 27 in contour at the lower part at 30 are made on the same radius as the mui'ller 1 to tit snugly against it when the louvre is opened, and another contour 3l higher up of the same radius but eccentrically placed. This forms an abutment When the louvres are closed. lVhen the louvres are open ,slots 32 formed in the ends 27 permit the flanges 17 of the outer casing to enter whenever the louvres are closed.

',l`o operate the louvres, projections 33 are attached at one end. These are slidable in slots 3G formed at the same end of the grating 21, so as to control the flow of cold air from within the car down the two cold air passages, 34, past the flanges 17, through the openings 24 into Contact With the heated outer tube of the mufHer and upward tl'irough the Warm air interior of the car. I

It is no limitation to make the heater shorter than the length of the'muller, as instanced in the drawing, for this relation may be varied as needed Without departingfrom the spirit of my invention.

IVhat I claim is: v

l. In heaters, a suitable casing, a muffling element within the casing, a heat radiating surfacev exterior of the muiler, means v ear body, passages 35 into the,

for-variably directing air through the ing to'engage the heating surface, and means for selectively delivering the heated air as whereby a' heat producing stream of exhaust gases is brought into contact with the interior of the heatingsurface and the muffler.

il. In heaters, a carbody, an engine exhaust, a muffler in the exhaust, a casing surrounding the muffler, an air inlet from inside the car body to the interior of the casing, an air outlet .from the casing terminate ing within the car body, and means for variably controlling the airinlet and outlet as desired.

4. In automobile heaters, a car body, an engine exhaust, a mufller in the exhaust, a heating chamber cooperating With the muffler, an air inlet from the inside of the car body to the heating chamber, an air outlet from said chamber terminating Withinv the and means for Variably controlling theair inlet and outlet as desired.

5. In heaters, a suitable casing, a heating surface Within the casing, a muilling element within the heating surface, and means for 'variably directino cold air into contactwith said surface to extract heat from the exterior thereof simultaneously with the extrac- 1 tion of heat from its interior due to the muffling action.v

In testimony whereof I alix my Signature.

,GEORGE H. EARLE. 

